Basic BEA papers about FCTs, and special info for FCTs in FAIR HEBT lines:
Calculated Charge Resolutions for Fast Current and Resonant Transformers
Signal Estimates and Electronics Scheme for Fast Current Transformers in High-Energy Transfer Lines
Investigation of a little bit of Fast Current Transformer response at HTP
Already in 1995, four GSI-made FCTs T-DS114 had been installed in the GSI HEST lines:
GTE1DT1FP
GTE5DT1FP
GHHTDT7FP
GHTPDT1FP
After 2005, commercially available FCTs from Bergoz Instrumentation have been added to SIS 18 and ESR:
GS01DT1FP, which had been relocated from it's initial position in GS07, eventually
GE02DT1FP
Main characteristics of the installed FCTs:
GSI FCT in HEST lines
- GSI model no.: T-DS114
- ID of toroid = 160mm
- sensitivity/transimpedance: 0.23 A/V (or 4.2 V/A)
- @termination: 50 Ω
- low freq. cutoff -3dB: ~2 kHz
- high freq. cutoff -3dB: ~300 MHz
Bergoz FCT in SIS18
- Bergoz model no.: FCT-260-50:1-LD-H
- ID of toroid = 260 mm
- sensitivity/transimpedance: 0.5 V/A
- @termination: 50 Ω
- low freq. cutoff -3dB: ~200 Hz
- high freq. cutoff -3dB: ~690 MHz
- separate output for Ring RF through power divider, which reduces sensitivity by factor 2 !
A FESA DAQ FOR FAST CURRENT TRANSFORMER IN SIS 18
Fig:
Typical Bergoz FCT toroid
Bergoz FCT in ESR
- Bergoz model no.: FCT-260-1.25-LD
- ID of toroid = 260 mm
- sensitivity: 1.25 V/A
- @termination: 50 Ω
- low freq. cutoff -3dB: ~650 Hz
- high freq. cutoff -3dB: ~570 MHz
- separate output for Ring RF through power divider, which reduces sensitivity by factor 2 !